| Adrian Alastair Montague | Director | 2 Dec 2002 | 6 Feb 2006 | British | 78 years |
| Andrew Spurr | Director | 26 Jun 2009 | 31 Dec 2013 | British | 73 years |
| Brian Cowell | Director | 1 Nov 2017 | 2 Dec 2019 | British | 65 years |
| Charles Noel Davies | Director | 12 Jan 1996 | 15 Jul 1999 | British | 93 years |
| Clare Mary Joan Spottiswoode | Director | 1 Dec 2001 | 28 Dec 2005 | British | 73 years |
| David Fraser Mitchell | Director | 28 Apr 2015 | 5 Feb 2018 | British | 53 years |
| David Pryde | Director | 1 Sept 2004 | 28 Dec 2005 | American | 77 years |
| David Stuart Gilchrist | Director | 1 Sept 2001 | 5 Aug 2004 | British | 74 years |
| Duncan Hawthorne | Director | 1 Sept 2001 | 11 Mar 2004 | British | 71 years |
| Ian Harley | Director | 1 Jun 2002 | 28 Dec 2005 | British | 76 years |
| Jean Elizabeth Macdonald | Secretary | 3 Jul 2009 | 19 Jul 2010 | British | - |
| Jean Elizabeth Macdonald | Director | 2 Jun 2009 | 19 Jul 2010 | British | 69 years |
| John Bullock | Director | 13 Dec 1995 | 15 Jul 1999 | British | 93 years |
| John J Delucca | Director | 9 Feb 2004 | 28 Dec 2005 | American | 83 years |
| John Weddell Robb | Director | 13 Dec 1995 | 17 Jul 2001 | British | 90 years |
| Julia Maria Walsh | Director | 1 Apr 1996 | 17 Jul 2002 | British | 78 years |
| Keith Geddes Lough | Director | 1 Sept 2001 | 8 Dec 2003 | British | 67 years |
| Matthew Sykes | Director | 2 Dec 2019 | 1 Apr 2023 | British | 64 years |
| Michael Brian John Low | Director | 15 Jul 1999 | 25 Apr 2000 | British | 78 years |
| Michael Ralph Kirwan | Director | 13 Dec 1995 | 3 Jun 2002 | British | 85 years |
| Mike Alexander | Director | 3 Mar 2003 | 20 Mar 2005 | British | 79 years |
| Pascal Colombani | Director | 1 Jun 2003 | 28 Dec 2005 | French | 81 years |
| Peter David Stevenson | Director | 13 Dec 1995 | 28 Feb 2003 | British | 79 years |
| Peter Thomas Hollins | Director | 1 Feb 1998 | 7 Jun 2001 | British | 79 years |
| Peter Thomas Warry | Director | 7 Nov 1996 | 30 Sept 1998 | British | 77 years |
| Robert Charles Finch Hill | Director | 1 Jan 1999 | 30 Jul 2003 | British | 89 years |
| Robert Guyler | Director | 18 May 2012 | 28 Apr 2015 | British | 60 years |
| Robert Hawley | Director | 13 Dec 1995 | 30 Jun 1997 | British | 90 years |
| Robert Malcolm Armour | Director | 20 Feb 2006 | 3 Jul 2009 | British | 67 years |
| Robert Malcolm Armour | Secretary | 13 Dec 1995 | 3 Jul 2009 | British | - |
| Robert Walmsley | Director | 1 Aug 2003 | 28 Dec 2005 | British | 85 years |
| Robin Adair Biggam | Director | 1 Apr 1996 | 10 Jun 2002 | British | 88 years |
| Robin Campbell Jeffrey | Director | 13 Dec 1995 | 10 Feb 2003 | British | 87 years |
| Roy Anderson | Director | 16 Sept 2004 | 6 Feb 2006 | British | 78 years |
| Salvatore Martin Gatto | Director | 8 Dec 2003 | 16 Sept 2004 | British | 76 years |
| Simone Rossi | Director | 1 Apr 2011 | 18 May 2012 | Italian | 58 years |
| Stephen Robert Billingham | Director | 16 Sept 2004 | 31 Mar 2009 | British | 68 years |
| Stuart Crooks | Director | 1 Jan 2014 | 31 Oct 2017 | British | 61 years |
| Thomas Andreas Kusterer | Director | 1 Apr 2009 | 29 Mar 2011 | German | 58 years |
| William Alfred Coley | Director | 1 Jun 2003 | 31 Jul 2009 | British | 83 years |